Feeding mechanism for stamping-presses.



E. M. COVERT. FEEDING MECHANISM FOR STAMPING PRESSES.

APPLICATION FILED JUNE 9, 1917 Patented Sept. 11, "191?.

2 SHEETS-SHEET S.

I E. M. COVERT. FEEDLNG MECHANISM FOR STAMPING PRESSES.

APPLICATION FILED JUNE 9, 19H.

2 SHEETSSHEET 2.. V

Fig.2.

INVENTOTf.

wmmmw a? 17W maeu a ERSKINE M. COVERT, OF souTH 38mm), INDIANA.

FEEDiNG iufiefillltisivr Fee esteem-messes.

peeifidation of Letters Patent.

Patented Sept. 11, 191%.

Appiibation filed June 9, 1915'. "serial N6. 173j729.

To all whom it may concern:

Be it known that I, EisKINE M. COVERT, a citizen of the United States; residihg in the city of South Bend, county of St. Joseph, Indiana, hiti e' ihvent'ed new and useful Improvements in Feeding M'echzvnisin for stam ing- Presses, of which the following is a specifieatien.

My ihventieh relates to im rovements 1h feeding mechanism for metal stampihg presses ofthe ihclined type wherein metal disks or plates are pressed or pun'e'hed into various fotms.

The principal object of my invention is the prtiduetion of a device of the chart'cter described in which metztl blanks, or plates, are deposited in a holder by the eper'ator at 8- point remote from the stamp or punch of the press machine and immediately there afte1'.meehanically moved to and depgisited uponthe die ahead of the descending stampwhereby all danger to-the fingers and hsmds of the operator is eliminated.

Another object is the 1')r0ducti01'1 of adevice of the chi'r'acter described which per"- mits of continuous o eration of the stamping machine: Other objects Of my invention will be described herein;

The preferred embddiment of my invention is well illustrated in the accom an ing drawings in which Fi 'iii'e 1 is a side elem tion of my invention siewing fragment of a stampin press tt) which the inveiition is applied; Fig; 2 is a plan View of the ptn or blank holder, guideway, step fingers and other members assembled nrouii'd the pith 01 holder; and Fig. 3 is a plavfi View efthe driving mechanism. 6

Similar numerals of reference refer t6 similar members and parts of membersthioughout the sei efal Views on the draw- I'IIIUS.

lteferring' to the drawings in detail, the riumerals 1 51nd 2 indicate substantially parallel frame bars rigidly cohnected by a transverse bar 3 the whole being" secured at its forward efld to the pi'e'ssl i'ame l tindprojecting therefrom outwardly and 1pwardly somewhat. The numeral 5 indicates a die member carried by the press and adapted to be pefiedic'tilly engaged by a; reeipi'oca-tory stamp 6, in the usual manner, for pressing the metal blanks into form thereon:

The n m r l 7 and 8 indicate pair f eoiiper'atiii'g and parallel guide members rigidly mounted upon the tiansverse frzi me bar 3 :iiid spaced apart to {record with the diameter of the die 5, having their fori'v'ar'cl 'o'r clischztrg'e ehds arran ed edjaeent die. The numeral 9 indicates a shaft exte ding transversely of the frame merhbersl arid 2 joui'nfiled at 10 "and 11, resp'eetive'ly, in the cititer' ends of said frame members. The numeral 12 indicates the disk br blaiikhelder, or receiving Pith, open at its forward end and which seem uptin the oiit'erends of the guides 7 and 8, fetid flanged on eiie'h side and the back end thereof, said heekend being proi ided with a pair of lugs 18 'athd 14 which are suitably apertured at 15 aiid 16 respectively, for mo'iliiting the pin 17. r m V The numeral 18 indi'c'ates a lever i evolubly rhount'ed iipen the shaft 9 beneath the pan 12; the hub whereof normally supports said pzth, the outer 'eiitl (if said lever being apertiire'd at 19 to receiye the pili 17 and upon which it is mounted. The numeral 20 indicates a leir'e'rerm projecting from the hub (if the lever 18 the outer eiid (it which is pivotally eeiiiiected with the lever ztctuati'on rod 21 adapted ti) periodically oscillate said leifier in a veitiezll plane, by means hereinafter desciibed, for tilting the pan 12 arid msving' it fo'i'w'ztrd. The humeral 22 ihdic'ates it stop finger ree'ess formed in the floor of the pan'l2 at its open end and intermediate its side flanges, md i11 which the poirl't of the stop finger 23 is nprmslly ar iiiiig'e'd, pi'ojectihg' above the floor of the pain to limit the fii'wdrd movement, or sliding" teiidehey, of each blank 21S it is placed in the pan by the operator". The base of the fiiiger 23 is l'igidly fastened t6 the hub bf the leve'is 18 died 20 by d screw 2' 1, or otherwise, the point Of said finger heirig adapted to be periodically feti zicte'd from the recess 22 when the levers 18 and 20' er'e'oseillzited by the actuation of the rod 21,- as hereintrfter described.- The numeral 2 5 iiidieates ii c'oil tension spring anchored to the rod 21 at 26 and fzisten'ed to the uhde'i' side of the pm 12 at 27,- being add-ptcd to yielddbly confine the fo'i'ii erd end of sztid pan tipon' the guides 7 and 8: I

The numerals 28 Mid 29 iiididate pair of stop ztrms pit-*cttlly mbuhted li-pcri the frame members at 3'0 and 31, respectively, and on opposite sides of the die 5, being adapted,

6. The numerals 32 and 33 indicate coil springs anchored on the frame members at 3.4 and 35, respectively, and connected with the stop arms 28 and 29 at 36 and 37 respectively, and adapted, when the arms 28 and 29 are relieved of the restraint hereinafter described, to move said arms into operative position, said position being the position of the arms shown in full or solid lines in Fig. 2 of the drawings. The numerals 38 and 39 indicate a pair of stop arm retraction chains, or members, connected at their outer ends with the retraction levers 40 and 41, respec tively, said levers being rigidly mounted upon the shaft 9 adjacent its opposite ends and connected with said step arms at 42 and 43, respectively. p g

The numeral 44 indicates a lever rigidly mounted upon the shaft 9 and connected at its outer end with the actuation rod 45 which is adapted. to oscillate said lever, as hereinafter described, thereby partially rotating said shaft for relieving the arms 28 and 29 of the restraint of the chains 38 and 39,.

In operation,-the blank to be stamped is placed tithe pan or holder 12, .the blank edge sliding into engagement with the stop finger 23. Normally the stop arms 28 and 29 are retracted by the chains 38'and 39, as indicated by-the dotted lines of said arms in Fig. 2, and the inward movement of said stop arms is timed to occur prior to the pro jection of the blank from the pan 12. Closely following the inward movement of said stop arms 28 and 29 the levers 20 and 18 are oscillated by the vertical actuation of the rod 21, thereby retractingv the point of the stop finger 23 from the aperture 22 and tilting the pan 12 upward and forward, whereby the blank carried in said pan is projected therefrom upon the guideway 7 and 8 and thence to the die 5, beingv stopped and held in position upon the die by the arms 28 and 29.

The numeral 46 indicates a shaft suitably mounted in the 'base of the press (not shown). or in any other suitable manner, and upon which are pivotally mounted the driver arms 47 and 48, the forked outer ends whereof are operatively connected with the lower endsof the rods 21 and45, respectively. The-numerals 49 and 50 indicate coil tension springs connected with the arms 47 p and 48, respectively, both of which springs are anchored in a base member 51 or to the base of the press, the latter not being shown. The inner ends, or opposite extremities, of the-arms 47 and 48 are arranged beneath the driver disk shaft 52 and are normally; held in contact therewith by the;tension of the springs 49; and 50,.said

sh'aft'being suitably journaled in the press base (not shown).

Thenumeral 53 indicates a driver disk, or cam pin carrier rigidly mounted upon the shaft 52 upon the opposite lateral peripheries whereof are rigidly mounted the laterally projecting cam pins 54 and 55, respectively, arranged in different disk radial planes and adapted to be moved by the rotating disk 53 into successive engagement with the arms 48 and 47, r espectively,. for effecting the successive depression movements thereof, whereby the levers 44,18 and 20V are oscillated. The numeral 5'6 indicates a tooth. clutch member rigidly mounted upon=one.,end of the shaft52 and adapted to be engaged bythe clutch member 57 which is splined upon thedriving shaft 58 and adapted-to be. shifted back imdforth thereonsby any suitable shifting mechanism. The numeral 59, indicates .a drivin sprocket wheel rigidly mounted on the driving shaft 58 and engaged by a sprocket chain 60 operative-1y connected with an initial driving sprocket wheel v(not shown) for transmitting power to the shaft 58. 1

. From the foregoing description it isevident that the rod 45 isupwardly actuated by the cam pin 55 prior to theactuation of theyarm 47 by the pin 54,"thereby oscillate ing the lever 44 and partially rotating the shaft.9,. whereby both levers 40 and 41 are oscillated toward the fingers 28 and29'and relievingthem of the tensionor restraint of the chains 38 and 39. Thereupon, the ex ertion ofthe springs 32 and 33 closes the stop fingers .28 and 29 against the die. 5; Immediately thereafter the cam pin, 54 actuates the rod 21, whereby the levers l8 and 20 are oscillated and thestop fingers 23 moved downward and out' of the panreeess 22, whereby the pan 12 ismov'ed forward and rear end thereof upwardly tilted discharging the blank upon the guides 7 and 8. When the arms 47 and 48 are relieved of the exertion of the-disk pins 54 and 55 theyare retracted by thesprings 49 and-50, whereby the fingers 28- and 29 are retracted by the'chains 38 and 39 and the pan 12 is restored to its original position,;with the stop finger point again projecting through the pan recess 22. Following the retraction of the fingers 28 and 29, as indicated by the dotted lines thereof in Fig.v 2, thepressed and finished disk or plate is discharged from the die and forwarded, said fingers being retracted to permit of the passage of the disk in its'finished state.

lclaimz' 1. The combinationwith a pressing machine of the class'described'and a guideway for delivering blanks inthe path of the machine stamp, of a tiltably mounted blank holding member having one end thereof arranged adjacent said-guicleway; a retractlee able finger for confining the blank in said holder; means for retracting saidafinger to. permit the dischargecf the blank from said 7.

holder whensaidholder, is tilted; means for tilting said blank holder fordischarging the blank therefrom upon said guideway;

movable stop means adapted to limit, the:

machine stamp, of a movably and tiltably mounted blank holding member having one end thereof arranged adjacent said guideway and adapted to be tilted and moved forward for discharging a blank upon said guideway; a retractable finger for confining the blank in. said holder; means for retracting said finger; means for tilting and forwardly moving said blank holder for discharging the blank therefrom upon said guideway, movable stop means adapted to limit the movement of the blankand for con fining it upon the machine die; means for synchronizing the stop means movements with the movements of the machine stamp; and means for retracting the blank holder after discharging the blank upon said guideway.

3. In a device of the class described and in combination with the guideway for delivering blanks in the path of the machine stamp, a movable and tiltable blank receiving pan having one end thereof slidably mounted adjacent one end of said guideway; a retractable stop finger for confining the blank with in the pan prior to the tilt thereof; mechanism for tilting and forwardly projecting said pan to discharge the blank upon said guideway said mechanism including devices for retracting said stop finger to permit the discharge of the blank from said pan; and means for retracting said pan.

4:. In a device of the class described and in combination with the guideway for delivering blanks in the path of the machine stamp, a movable and tiltable blank receiving pan having one end thereof slidably mounted adjacent one end of said guideway; a retractable stop finger for confining the blank within the pan prior to the tilt thereof; periodically operating mechanism for tilting and forwardly projecting said pan to discharge the blank upon said guideWay, said mechanism including devices for retracting said stop finger to permit the discharge of the blank from said pan; and resilient means for retracting said pan, said pan retracting means being cooperative with means for confining the forward end of said pan upon its mount.

5. In a device of the class described and in I combination with theiguideway for delivering-blanks .in the path of the machine stamp, a movable and tiltable blank receiving pan having one end thereof slidably mounted and resiliently restrained adjacent one end of saidguideway; a retractable stop finger for confining the blank within the pan prior to the tilt thereof; periodically operating mechanism for tilting and forwardly projecting said pan to discharge the blank upon said guideway, said mechanism including devices for retracting said stop finger to permit the'discharge of the blank from said pan; and means for retracting said pan, said means including devices for restoring said stop finger 'to the stop position.

6. In a device of theclass described and in combination with the guideway for de livering blanks in the path of the machine stamp, a blank receiving pan having one end thereof slidably mounted upon one end of said guideway and having its opposite end carried by an oscillatory lever adapted to be oscillated in a vertical plane for tilting and forwardly projecting said pan; periodically operating means connected with said lever for oscillating it in a vertical plane; spring actuated means for effecting a retraction of said lever, and thereby said pan; and resilient means connected with said pan for confining it upon said guideway.

7. In a device of the class described and in combination with the guideway for delivering blanks in the path of the machine stamp, an inclined blank receiving pan having one end thereof slidably mounted upon said guideway and having its other end carried by an oscillatory lever adapted to be oscillated in a vertical plane for tilting and forwardly projecting said pan; means for resiliently confining said pan upon said guideway; a stop finger having one end thereof carried by said lever and its outer end projecting above the floor of said pan, said finger being movable with said lever; periodically operating means connected with said lever for oscillating it in a vertical plane; and means for retracting said lever, and thereby said pan.

8. In a device of the class described and in combination with the guideway for delivering blanks in the path of the machine stamp, a blank receiving pan having one end thereof slidably mounted adjacent one end of said guideway and having its other end carried by an oscillatory lever adapted to be oscillated in a vertical plane for tilting and forwardly projecting said pan; periodically operating means for oscillating said lever said means comprising an arm connected with said lever, a rod connected with said arm, a lever arm pivotally mounted intermediate its extremities and operatively connected at one end with said rod, and a rotary cam member periodically engaging the lever arm for depressing it; and means for retracting said oscillatory lever, and thereby said pan.

9. In a device of the class described and in combination with the guideway for delivering blanks in the path of the machine stamp, a blank receiving pan having one end thereof slidably mounted adjacent one end of said guideway and having its other end carried by an oscillatory lever adapted to be oscillated in a vertical plane for tilting and forwardly projecting said pan; periodically operating means for oscillating said lever said means comprising an arm conconnected at one end With said rod, and a rotary cam member periodically engaging the lever arm for depressing it; and resilient means connected With said lever arm for retracting it, and thereby said oscillatory lever and said pan.

In testimony whereof I have hereunto affixed my signature this 2d day of June, 1917.

ERSKINE M. COVERT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

